Nut-lock.



L. L. ROBERTS.

I, NUT LOOK. APPLICATION FILED SEPT. 21, 1907.

Patented May 11, 1909.

Q VIM! against. being turned oil.

I elevation.

N @FFICE.

LULA L. ROBERTS, OF HILLIARD. FLORIDA.

nor-1.001;.

. Specification of Letters Patent.

Patented May 1 1, 1909.

Application filed September 21, 1907. Serial No. 398,952.

'[0 all whom it may concern:

Be it known that I, IJULA L. ROBERTS, a

citizen of the United States, residing at Hilliard, in the county ofNassau, State of I Florida, have invented certain new anduseful-Improvements in Nut-Locks; and-I do hereby declare. the following to bea lull, clear, and exact description of the in ventiou, such as willenable othersskilled in the. art to .which it appertains to make and usethe same.

This invention has relation to that class of nut-locks that are composedof two members or sections having a screw-tl'n'eaded connection withthemselves and the bolt on which they are turned'and that have aconstruc tion andrelationship in virtue of which a tendency of theclamping nut to turn oil the bolt, will act upon the locking nut to turnthe former not on, or at least stop' it It is the object of myimprovements to provide each member of the devicewith a screw-threadedconnection with each other, and each with the bolt, which screw-threadedconnections will operate to lock the menu hers on the bolt so that eachwill be locked against beingturned oil the bolt by the other and againstturning on the bolt by an y action of the latter.

The nature of the invention is fully and clearly ascertainablc from thedevice portrayed in the annexed drawings, forming a part of thisspecification, in view of which it.

will first he described with respect to its construction and mode ofoperation, and then be pointed out in the subjoined claim. 1

()l' the said drawingsligure l is a side view showing the inventionapplied to fishbars and a railway rail the former being re resentedinsection. Fig. 2 is a sectional side view ot the invention. parts beingshown in Fig. .l is a side view ol' the clamping nut.

Similar characters of reference designate similar parts or features, asthe case may be, wherever they occur.

While my invention may be engaged in any use to which it is applicable,it is especially ada )tcd 'l'oruse on bolts by which fishbars areclamped on the webs of rails at railway-rail joints to hold the parts inalinement. In any case the bolt is somewhat reduced on its end portion4, which is provided with a relatively line left-hand thread, and theadjacent portion 5 of the bolt is provided with a coarse right-handthread 6. The body of the bolt forms an annular shoulder around the saidreduced portion.

7 designates a clamping nut, internally t-l'ireaded to be turned on theportion 5 of the bolt. Externally the inner part of 8 the nut 7 is maderectangular in cross section to admit of a wrench being applied thereto,

while its outer part is made round and has a left-hand threadb?cutthereon.

9 designates the locking nut, that may be square externally in crosssection, the outer portion being preferablv reduced in diameter. A holeH) is made through the locking member, that on the outer reduced portionbeing of a size and screw-threaded at 11 in such a way as to adapt it tobe tiu'ned on the finer screw-thread 5 of the bolt.

Inward from the internal screw-thread portion 11, the hole 10 isenlarged tor a short distance as at 12, so as to admit the outer portion5 of the bolt without being atl'ected by the coarser screw-threadthereon.

The inner enlarged portion of the locking memb'er 9 is socketeF-that is,the hole 10 is enlarged considerably at the point 12, and is rovidcd onthe outer end with a lefthand t'ircad 43 to adapt it to be screwed onthe outer reduced threaded end 8 of the clamping out 7. l

In use the inner or clamping member 7 will be turned on the largerright-hand thread 6 of the bolt to an extent sutlici'erit 'threadedconnections with the bolt will beby threads of dill'crent pitch, so thatno actions of the nuts upon each other or vibrations of the bolt,tending to turn the nuts on the bolt or the. bolt in the nut can operateto lt)()S(Hl l;l'l(!lll, lllllt! the locking member may be readilyturned oil by holding on to the clamping member and turning the formermember in a direction opposite to that in which it was turned on.

It is to be noted that the bolt extends Yided with Ilu'cuds on theexterior thereof through both members the threaded portions nuts engagedthereby, so that the bolt may contacts with the shoulder at the end ofthe large screw 12 While the other two shoulders contact with the twosl'mulders on the exterior the nut 8.

What is claimed is In a device of the kind described, it bolt of thenut, and that of the same pitch es the threads on the re- 5 end 6 of thebolt are longer than the threaded portions of the be employed ondifferent tliricknesses pt enlarged shouldered due-ed portion oi theshank, at second nut provided with en npr'erture having threads therein:uhirdved to engage the reduced portion of the shank an enlargedshouldered portion mhuned to i'it over the endo'f the larger portion ofthe Sllzlllli, and a second portion of the same ,length =1 lln' reducedportion of the first provided with 2., shank having an annular shouldernear the end to forin tion, threads formed on said shank and reduc'edportion, the threads on the shank being of grenterpitch then the threadson the reduced portion, a nut having a threaded aperture held upon saidshenk, a reduced e reduced porl shouldered portion formed on said nutpro nientienm'l nut and provided With threads engaging: ihe'ilirrzid onthe lirst mentioned nut, second nut being nrrunged for the sl'loulderedrmriions to bear against the shouldoird portion of the shank, the faceof tllrrrdurvd portion of. the first nut and the edjurr-nl saidredured,portion of said \"luua'j-ol' l7 nllix my signein nivlenre ollu'o mosses.

IHP

